The page for Conversion needs updating. As of X and Y, Conversion changes the type of the user to match the first move in its move list.
The page for Conversion on this site still gives its pre-Gen VI mechanics - that it changes the type of the user to match one of its moves.
Given that Conversion is exclusive to the Porygon line, most people probably haven't realised that its mechanics have changed. I only noticed because I happened to be training up a Porygon-Z today, and looked at Conversions description.
Source(s): the aforementioned Porygon-Z, and confirmed by Bulbapedia
Also, while I am talking about Conversion anyway, it should have a "changes" section already, because in Gen I it changed the user's type to match the opponent's type, not the type of one of its own moves.
